Steven Fraser Posted January 17, 2009 Share Posted January 17, 2009 Centre, Well about the tilt. The only knowledge I have about that is that the cricothyroid is responsible for lengthening the vocal cords (raising the pitch). And when the cricothyroid contracts it tilts the thyroid cartilage. So basically when you sing higher pitches the thyroid cartilage tilts. maybe someone could elaborate on that?? Martin H: The relationship of pitch, activity of the cricothyroid, and tilt of the thyroid cartilege is as you say, though I find that word order sometimes helps the clarity of understanding of what is cause, and what is effect. Here is the best way that I know how to put the same idea into context: When you think of a note, right before you start the note the intrinsic muscles of the larynx position the cartileges to produce the note the way you have conceptualized it. Amongst the vocology geeks, this is 'Prephonatory tuning'. For notes of higher pitch, the Cricothyroid muscle positions the thyroid cartilege with more forward tilt than for lower pitches, as a result of the thought. So, basically when you are singing higher pitches, the thyroid cartilege has been tilted further to produce them. However, this description does not indicate the level of activity in the CT and the TA muscles during phonation. Since they both pull on the thyroid cartilege, they can be in isometric antagonism... they can fight each other. When that happens, the tissues of the vocal bands will get stiffer, closed quotient will rise, glottal waveform changes shape, and the resulting tone quality is different. Link to comment Share on other sites More sharing options...
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